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Finding the Fourth Proportional to 551,606,166.40, 827,409,249.60 and 388,347,491.20

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Solution

The fourth proportional to 551,606,166.40, 827,409,249.60 and 388,347,491.20 is: 582,521,236.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,606,166.40 : 827,409,249.60 = 388,347,491.20 : x
  2. Step 2: Convert to fraction form
    551,606,166.40/827,409,249.60 = 388,347,491.20/x
  3. Step 3: Cross multiply
    551,606,166.40x = 827,409,249.60 × 388,347,491.20
  4. Step 4: Simplify right side
    551,606,166.40x = 321,322,306,277,834,624
  5. Step 5: Solve for x
    x = 321,322,306,277,834,624/551,606,166.40
  6. Step 6: Final answer
    x = 582,521,236.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.